feat: Allow superset to be deployed under a prefixed URL (#30134)

Co-authored-by: Kamil Gabryjelski <kamil.gabryjelski@gmail.com>

.github/workflows/bashlib.sh

@@ -145,6 +145,7 @@ cypress-install() {
 
 cypress-run-all() {
   local USE_DASHBOARD=$1
+  local APP_ROOT=$2
   cd "$GITHUB_WORKSPACE/superset-frontend/cypress-base"
 
   # Start Flask and run it in background
@@ -152,7 +153,12 @@ cypress-run-all() {
   # so errors can print to stderr.
   local flasklog="${HOME}/flask.log"
   local port=8081
-  export CYPRESS_BASE_URL="http://localhost:${port}"
+  CYPRESS_BASE_URL="http://localhost:${port}"
+  if [ -n "$APP_ROOT" ]; then
+    export SUPERSET_APP_ROOT=$APP_ROOT
+    CYPRESS_BASE_URL=${CYPRESS_BASE_URL}${APP_ROOT}
+  fi
+  export CYPRESS_BASE_URL
 
   nohup flask run --no-debugger -p $port >"$flasklog" 2>&1 </dev/null &
   local flaskProcessId=$!

.github/workflows/superset-e2e.yml

@@ -42,6 +42,7 @@ jobs:
       matrix:
         parallel_id: [0, 1, 2, 3, 4, 5]
         browser: ["chrome"]
+        app_root: ["", "/app/prefix"]
     env:
       SUPERSET_ENV: development
       SUPERSET_CONFIG: tests.integration_tests.superset_test_config
@@ -135,7 +136,7 @@ jobs:
           CYPRESS_RECORD_KEY: ${{ secrets.CYPRESS_RECORD_KEY }}
           NODE_OPTIONS: "--max-old-space-size=4096"
         with:
-          run: cypress-run-all ${{ env.USE_DASHBOARD }}
+          run: cypress-run-all ${{ env.USE_DASHBOARD }} ${{ matrix.app_root }}
       - name: Upload Artifacts
         uses: actions/upload-artifact@v4
         if: failure()